Pipe joint



Nov. 29, 193s. J. BOUCHER "2,138,135

PIPE JOINT 3 sheetssheet l Filed May 9, 1935 Nav. 29, 193s. J'. BOUCHER PIPE JOINT Filed May 9, 1935 s sheets-sheet 2 IN VENTO@ Patented Nov. 29, 1938 UNITED STATES PATENT or-Fl'cE 2,138,135 y PIPE .vom

Jacques Boucher, Boulogne-sur-Seine, France,

assignor to Socit Anonyme des Hauts Fourneaux et Fonderies de Pont-a-Mousson, Ponta-Mousson, France Application May 9, 1935, semi No. 20.595 In Belgium May as, 1934 1 Claim.

5 is obtained by means of a packing ring of indiarubber or like yielding material which is inserted in the annular space between the interior of the enlarged end of one pipe and the plain end of the other pipe, this ring being compressed `by` l means of a suitable device termed the lpressing gland.

One object of the present invention is adevice for the assembling of pipes, which is of a simple construction, may be rapidly mounted, and is abl solutely non-leaking in spite oi all distortions.

The said device is chiefly characterized by the fact that the pressing of the said gland is eected by means of screw devices which bear directly or indirectly, by a joint of the bayonet type, upon .10 lugs provided on the inner or outer surface of the enlrged end of one of the two pipes to be assemble According to one embodiment, the device comprises, in combinationza gland which is mounted by means of a bayonet-like Joint` upon lugs provided on the inner or outer part of the er1- larged portions of the pipe; and screws, bolts or studs provided with nuts bearing upon the gland and holding the same against the packing ring. A further feature resides in a construction wherein the gland is pressed by means'of bolts and nuts, the heads of the bolts, or nuts, having a suitable form and bearing directly against the inner part of the enlarged end, by means of a bayonet-like joint.

A still further feature resides in the provision 'of screws for tightening the gland,which screws are screwed to a certain number of anchoring members which bear upon lugs provided in the interior of the enlarged end.

These and other teaturesfof the invention will be better understood with reference to the accompanying drawings, which are given solely by way of example, and wherein:

Fig. 1 is a partial lengthwise section, on the line I-I oi' Fig. 2, ot an assembling device in conformity with the invention; in this Fig. 1, the dot-and-dash lines correspond to a section on,the line -I '-I' of Fig. 2.

5o Fig. 2 is a horizontal section on the line 2-2 of Fig. 1.

Fig. 3 is a section of a modiilcation, in which C the heads of the pressing bolts engage the lugs on the bell.

Fig. 4 is a front view of one of the said bolts.

Fig. 5 is a partial lengthwise section of an assembling device in conformity with the invention, in which the heads of the bolts bear upon the outer part of the enlarged end.

Fig. 6 is a front view of one of the said bolts. 5

Fig. 7 is a partial cross-section of the device, in which the gland is sectioned on the line 3-3 ot' Fig. 5.

nature, of other modications. l0

Figs. 10 and 11 are lengthwise sections of other modifications. In the embodiments herein represented, the

assembling device is adapted lfor the tight connection of two pipes 1 and 2. 'I'he pipe I has a l5 bell 3, into which the spigot pipe 2 is inserted. Between the end of the spigot pipe 2 and the bell 3, is mounted a packing ring 4 ensuring a non-leaking joint. The ring 4 is pressed in'place by means of a gland 5. l 20 The ring 4 consists of india rubber or of a plastlc substance. Its seating recess, abc, may have dlierent outlines, according to the shape of the ring which it contains, whether square, rectangular, trapezoidal, rounded, or of a combined form. 25

The lower part of the enlarged end comprises a recess def, and the inner face 6 of the gland 5 has a considerable taper.

In the example of execution represented in Figs. 1 and 2, an anchoring ring 8 is secured in 3o the interior of the bell 3 of the pipe I by means of a bayonet like joint. For this purpose, the bell 3 and the anchoring ring 8 are provided with an equal number of radially projecting spaced lugs 1 for the bell, and 9 for the anchoring ring. 35

` In order to secure this latter member, the lugs 3 are engaged between the lugs I and the anchoring ring vis rotated. This rotation is limited by the stops I0 (Fig. 2) cast in one with, the face of the anchoring member Il, thus providing for 40 ready alignment of the corresponding lugs.

Into the anchoring ring 8 are screwed the screws II whose heads I2 bear upon the gland 5, whereby the said screws are subject to tension.

'I'he stems of the screws I I engage in the empty 45 space in the edge of the joint which is located between two lugs 3.

In the modincation represented in Fig. 3 the bolts II serve both as connecting .means and as pressure devices, owing to the U shape of the crosssection of the head I3 (Figs. 3 and 4) In the embodiment represented in Figs. 5 to 9, the anchoring members are screwed up by bolts and nuts I2; the heads of the bolts I3 are provided with hooking ends 3 which bear upon lugs 55 1 formed on the outer part oi' the bell 3, the number of such lugs being equal to the numbe of bolts.

All of the hooking ends are engaged at the same time under the corresponding lugs, by means of a bayonet-like joint. During this Iltting operation, the rotation of the gland is limited by the lug 1 against which are brought the bosses l provided on the gland.

The assembling of the joint is facilitated by a matching arrangement comprising, on the one hand, suitable matching parts 2 I provided on the outer part of the bell 3, which remains visible after the assembling of the joint, and on the other hand, suitable matching parts 22 provided on the visible outer part of the gland. 'I'he said matchcoincidence corresponds either to the position of the insertion, or to the position of the tightening of the joint. Diierent matching parts corresponding to` each of the two above-mentioned positions may also be used simultaneously.

Obviously, each matching `arrangement lmay comprise either a single matching part or several matching parts having like positions relatively to the bolts Il or the lugs 1. The said matching parts may be painted or engraved, or may be cast integrally, or may be specially formed by any other means. 'I'hey may also consist of details of the members having a suitable form, for instance the'position of the bolts on the gland, or the trade-mark on the bell.

The heads I3 of the bolts II are provided with,

longitudinal ribs I4 which are -freely slidable in grooves I5 provided in the gland, thus preventing the rotation of the bolts, chiey when the gland is inserted and when the joint is tightened up. f

The ribs and grooves forming'the said guiding device may have a rounded shape, as represented in Fig. '1, or may have a trapezoidal shape, as shown in Fig. 8, or a T shape, as represented in Fig. 9, or any equivalent shape.

The heads of the said bolts have at their ends a bevelled part 25 (Figs. 5 and 6) which facilitates the mounting, upon the said bell, of the gland provided with the bolts.

Fig. represents a modication in which the special head of the bolts used in the preceding case is replaced by a nut of similar shape I2,

and herein the head I3 of the bolt II, will bear upon the gland 5.

In the modifications above described, the sur face of contact 2i between the hooking ends 3 and the ribs 1 may be perpendicular to the axis of the piping, as shown in Fig. 5. In this case, the axis X-X of the stems of the bolts may pass through the centre of this surface.

This arrangement permits. the avoidance when tightening the joint, of all kinds of transverse stresses having a tendency to release the said hooking ends, and it also has the effect of reducing the stress on the gland.

In the said modifications, a like result may be obtained by giving to the contact surface 2i a direction which is inclined from the axis of the piping, as represented in Fig. 10, this being such, for instance, that the line Y--Y perpendicular to this surface, will pass through the centre C of the surface of contact between the y gland 5 and the head I3 of the bolt or nut.

This last mentioned arrangement will permit, on the other hand, the unscrewing and releasing of a single bolt or nut without unscrewing the whole of the joint. This advantage is particularly important for the upkeep of the pipe lines in service.

The modification represented in Fig. 11 differs from the ones represented in Figs. 5 to 10, only by the fact that the bolts II have a head I3 of U shape, provided with hooking parts 3v and 9a adapted to bear against shoulders 1 and 1a formed on the exterior and in the interior of the bell 3. y

Having now described my invention what I claim as new and desire tosecure by Letters Patent is:

In a bell and spigot pipe Joint having a compressible packing ring between the bell and the spigot and a gland including an annular flange, means to press the gland with said annular flange against the packing rng, Said means comprising spacedradial lugs on the bell, circumferentially spaced bolts extending through said gland, anchoring members onsaid bolts guided in said gland for axial movement and having radially projecting lugs which positively engage said lugs on the bell when the gland is rotated, and meansy on said gland to prevent rotation of said anchor- 

